python3: Fixed ABC import for Python 3.8 compatibility.

[ashd.git] / python3 / ashd-wsgi3

diff --git a/python3/ashd-wsgi3 b/python3/ashd-wsgi3
index ba7038d..2ca259a 100755 (executable)
--- a/python3/ashd-wsgi3
+++ b/python3/ashd-wsgi3
@@ -1,19 +1,19 @@
 #!/usr/bin/python3
 
-import sys, os, getopt, threading, logging, time, locale, collections
-import ashd.proto, ashd.util, ashd.perf, ashd.serve
+import sys, os, getopt, socket, logging, time, locale, collections.abc, signal
+import ashd.util, ashd.serve, ashd.htlib
 try:
     import pdm.srv
 except:
     pdm = None
 
 def usage(out):
-    out.write("usage: ashd-wsgi3 [-hAL] [-m PDM-SPEC] [-p MODPATH] [-l REQLIMIT] HANDLER-MODULE [ARGS...]\n")
+    out.write("usage: ashd-wsgi3 [-hAL] [-m PDM-SPEC] [-p MODPATH] [-t REQUEST-HANDLER[:PAR[=VAL](,PAR[=VAL])...]] HANDLER-MODULE [ARGS...]\n")
 
-reqlimit = 0
+hspec = "free", {}
 modwsgi_compat = False
 setlog = True
-opts, args = getopt.getopt(sys.argv[1:], "+hALp:l:m:")
+opts, args = getopt.getopt(sys.argv[1:], "+hALp:t:l:m:")
 for o, a in opts:
     if o == "-h":
         usage(sys.stdout)
@@ -25,7 +25,9 @@ for o, a in opts:
     elif o == "-A":
         modwsgi_compat = True
     elif o == "-l":
-        reqlimit = int(a)
+        hspec = "free", {"max": a, "abort": "10"}
+    elif o == "-t":
+        hspec = ashd.serve.parsehspec(a)
     elif o == "-m":
         if pdm is not None:
             pdm.srv.listen(a)
@@ -145,58 +147,80 @@ def mkenv(req):
     env["wsgi.run_once"] = False
     return env
 
-if reqlimit != 0:
-    guard = ashd.serve.abortlimiter(reqlimit).call
-else:
-    guard = lambda fun: fun()
-
 def recode(thing):
-    if isinstance(thing, collections.ByteString):
+    if isinstance(thing, collections.abc.ByteString):
         return thing
     else:
         return str(thing).encode("latin-1")
 
-class reqthread(ashd.serve.wsgithread):
-    def __init__(self, req):
-        super().__init__()
-        self.req = req.dup()
+class request(ashd.serve.wsgirequest):
+    def __init__(self, *, bkreq, **kw):
+        super().__init__(**kw)
+        self.bkreq = bkreq.dup()
+        self.sendrights = None
+
+    def mkenv(self):
+        return mkenv(self.bkreq)
+
+    def handlewsgi(self, env, startreq):
+        return handler(env, startreq)
 
-    def handlewsgi(self):
-        return handler(self.env, self.startreq)
+    def fileno(self):
+        return self.bkreq.bsk.fileno()
 
     def writehead(self, status, headers):
-        buf = bytearray()
-        buf += b"HTTP/1.1 " + recode(status) + b"\n"
+        headers = list(headers)
+        for header in headers:
+            nm, val = header
+            if nm.lower() == "x-ash-send-rights":
+                self.sendrights = val
+                headers.remove(header)
+                break
+        w = self.buffer.extend
+        w(b"HTTP/1.1 " + recode(status) + b"\n")
         for nm, val in headers:
-            buf += recode(nm) + b": " + recode(val) + b"\n"
-        buf += b"\n"
-        try:
-            self.req.sk.write(buf)
-        except IOError:
-            raise ashd.serve.closed()
+            w(recode(nm) + b": " + recode(val) + b"\n")
+        w(b"\n")
 
-    def writedata(self, data):
+    def flush(self):
         try:
-            self.req.sk.write(data)
-            self.req.sk.flush()
+            if self.sendrights is not None:
+                ret = ashd.htlib.sendfd(self.bkreq.bsk.fileno(), self.sendrights.fileno(), self.buffer)
+                self.sendrights.close()
+                self.sendrights = None
+            else:
+                ret = self.bkreq.bsk.send(self.buffer, socket.MSG_DONTWAIT)
+            self.buffer[:ret] = b""
         except IOError:
             raise ashd.serve.closed()
 
-    def handle(self):
-        self.env = mkenv(self.req)
-        with ashd.perf.request(self.env) as reqevent:
-            super().handle()
-            if self.status:
-                reqevent.response([self.status, self.headers])
-    
-    def run(self):
+    def close(self):
         try:
-            guard(super().run)
+            self.bkreq.close()
         finally:
-            self.req.close()
-            sys.stderr.flush()
-    
+            if self.sendrights is not None:
+                self.sendrights.close()
+
 def handle(req):
-    reqthread(req).start()
+    reqhandler.handle(request(bkreq=req, handler=reqhandler))
 
-ashd.util.serveloop(handle)
+if hspec[0] not in ashd.serve.names:
+    sys.stderr.write("ashd-wsgi3: no such request handler: %s\n" % hspec[0])
+    sys.exit(1)
+hclass = ashd.serve.names[hspec[0]]
+try:
+    hargs = hclass.parseargs(**hspec[1])
+except ValueError as exc:
+    sys.stderr.write("ashd-wsgi3: %s\n" % exc)
+    sys.exit(1)
+
+def sigterm(sig, frame):
+    socket.fromfd(0, socket.AF_UNIX, socket.SOCK_SEQPACKET).shutdown(socket.SHUT_RDWR) # :P
+for signum in [signal.SIGINT, signal.SIGTERM]:
+    signal.signal(signum, sigterm)
+
+reqhandler = hclass(**hargs)
+try:
+    ashd.util.serveloop(handle)
+finally:
+    reqhandler.close()